Britney Spears Walks Off The X Factor Set After Contestant's Sings Her 'Crazy' Song (Photo : Reuters)

Pop Star sensation Britney Spears walked off the set of "X Factor" auditions after a contestant dressed partially as a woman, rocked through one of her hits, "(You Drive Me) Crazy."

Spears looked stunned throughout the performance, as fellow judge L.A. Reid patted her on the back. Judges Demi Lovato and Simon Cowell couldn't contain their reactions, as they covered their faces with their hands. And neither could the crowd, though they seemed to be instant fans of the audition.

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While Reid and Lovato followed the pop star off the set, Cowell stayed behind.

"I don't think she quite understood your tribute," he told the singer, who wore cat glasses, a bedazzled jean jacket, boots and his hair tucked in a bun.

"I had to fight real hard to get here," the tearful singer told the judges, adding that he was recently on welfare and nearly missed his X Factor call because he couldn't afford his phone bill.

"I really respect the tribute," Spears said when she returned to the judges' table. "It was really nice, but I just don't feel like it's for X Factor. Sorry, sweetie."

It's not the first time Spears has walked off following an audition as last month she was joined by Lovato and stand-in judge Louis Walsh, who was sitting in for an ill Cowell, in Kansas City when all four stormed off set when a contestant performed with his back to the panelists.